Csikszentmihalyi was Hungarian. I live in Hungary, and often work from a coffee shop called Flow with a Csikszentmihalyi quote on the wall, "Flow is being completely involved in an activity for its own sake. The ego falls away. Time flies. Every action, movement, and thought follows inevitably from the previous one, like playing jazz."
I'm a regular visitor to Budapest (both parents were born there) and have added all of these to my list of things to include on my next trip.. whenever that may be (borders).
RIP